iTunes restore error message

Well I was downgrading my ipod (because I hate 4.2.1) and I have itunes 10. I did everything they told me to do besides opening up some ports. (it says so here If you see an error when you update or restore your iPhone, iPad, or iPod - Apple Support) so I was wondering if anyone could tell me what to do. i don’t know how to open the ports and let my computer access those websites.
Here are the error messages… it stopped because I think I couldnt contact apple.

bumpity bump

search youtube about the error